1 /* internal.h: mm/ internal definitions
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
11 #ifndef __MM_INTERNAL_H
12 #define __MM_INTERNAL_H
16 void free_pgtables(struct mmu_gather
*tlb
, struct vm_area_struct
*start_vma
,
17 unsigned long floor
, unsigned long ceiling
);
19 static inline void set_page_count(struct page
*page
, int v
)
21 atomic_set(&page
->_count
, v
);
25 * Turn a non-refcounted page (->_count == 0) into refcounted with
28 static inline void set_page_refcounted(struct page
*page
)
30 VM_BUG_ON(PageTail(page
));
31 VM_BUG_ON(atomic_read(&page
->_count
));
32 set_page_count(page
, 1);
35 static inline void __put_page(struct page
*page
)
37 atomic_dec(&page
->_count
);
40 extern void __free_pages_bootmem(struct page
*page
, unsigned int order
);
43 * function for dealing with page's order in buddy system.
44 * zone->lock is already acquired when we use these.
45 * So, we don't need atomic page->flags operations here.
47 static inline unsigned long page_order(struct page
*page
)
49 VM_BUG_ON(!PageBuddy(page
));
50 return page_private(page
);
54 * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
55 * so all functions starting at paging_init should be marked __init
56 * in those cases. SPARSEMEM, however, allows for memory hotplug,
57 * and alloc_bootmem_node is not used.
59 #ifdef CONFIG_SPARSEMEM
60 #define __paginginit __meminit
62 #define __paginginit __init
65 /* Memory initialisation debug and verification */
72 #ifdef CONFIG_DEBUG_MEMORY_INIT
74 extern int mminit_loglevel
;
76 #define mminit_dprintk(level, prefix, fmt, arg...) \
78 if (level < mminit_loglevel) { \
79 printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \
80 printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \
84 extern void mminit_verify_pageflags_layout(void);
85 extern void mminit_verify_page_links(struct page
*page
,
86 enum zone_type zone
, unsigned long nid
, unsigned long pfn
);
87 extern void mminit_verify_zonelist(void);
91 static inline void mminit_dprintk(enum mminit_level level
,
92 const char *prefix
, const char *fmt
, ...)
96 static inline void mminit_verify_pageflags_layout(void)
100 static inline void mminit_verify_page_links(struct page
*page
,
101 enum zone_type zone
, unsigned long nid
, unsigned long pfn
)
105 static inline void mminit_verify_zonelist(void)
108 #endif /* CONFIG_DEBUG_MEMORY_INIT */
110 /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
111 #if defined(CONFIG_SPARSEMEM)
112 extern void mminit_validate_memmodel_limits(unsigned long *start_pfn
,
113 unsigned long *end_pfn
);
115 static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn
,
116 unsigned long *end_pfn
)
119 #endif /* CONFIG_SPARSEMEM */
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